Tungsten coating on JET divertor tiles for erosion/deposition studies

Sari Lehto (Corresponding Author), Jari Likonen, J.P. Coad, T. Ahlgren, D.E. Hole, M. Mayer, H. Maier, J. Kolehmainen

    Research output: Contribution to journalArticleScientificpeer-review

    31 Citations (Scopus)

    Abstract

    Six Joint European Torus (JET) divertor tiles were coated with tungsten marker stripes for erosion/deposition studies. The average thickness was 3.4 μm and the film was uniform within 5% across and within 10% along the stripe. Small amounts of impurities C, Fe, Ni and Cr were found and the in-plane stress was 965 MPa. Resistance to high heat loads was tested in the Neutral Beam Test-bed at JET where a coated carbon fibre composite block was exposed to a total of 113 pulses with a maximum peak power density of 15.7 MW m−2 and a maximum surface temperature of 1280 °C. No visible changes as a result of thermal cycling nor sputtering of the film by deuterium could be detected.
    Original languageEnglish
    Pages (from-to)241-245
    Number of pages5
    JournalFusion Engineering and Design
    Volume66-68
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed
    Event22nd Symposium on Fusion Technology - Helsinki, Finland
    Duration: 9 Sep 200213 Sep 2002
    Conference number: 22

    Fingerprint

    Tile
    Tungsten
    Erosion
    Coatings
    Thermal cycling
    Deuterium
    Thermal load
    Carbon fibers
    Sputtering
    Impurities
    Composite materials
    Temperature

    Keywords

    • tungsten coating
    • plasma
    • tungsten
    • erosion
    • deposition
    • divertor tiles
    • divertor
    • JET
    • ITER
    • fusion energy
    • fusion reactors

    Cite this

    Lehto, S., Likonen, J., Coad, J. P., Ahlgren, T., Hole, D. E., Mayer, M., ... Kolehmainen, J. (2003). Tungsten coating on JET divertor tiles for erosion/deposition studies. Fusion Engineering and Design, 66-68, 241-245. https://doi.org/10.1016/S0920-3796(03)00291-6
    Lehto, Sari ; Likonen, Jari ; Coad, J.P. ; Ahlgren, T. ; Hole, D.E. ; Mayer, M. ; Maier, H. ; Kolehmainen, J. / Tungsten coating on JET divertor tiles for erosion/deposition studies. In: Fusion Engineering and Design. 2003 ; Vol. 66-68. pp. 241-245.
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    title = "Tungsten coating on JET divertor tiles for erosion/deposition studies",
    abstract = "Six Joint European Torus (JET) divertor tiles were coated with tungsten marker stripes for erosion/deposition studies. The average thickness was 3.4 μm and the film was uniform within 5{\%} across and within 10{\%} along the stripe. Small amounts of impurities C, Fe, Ni and Cr were found and the in-plane stress was 965 MPa. Resistance to high heat loads was tested in the Neutral Beam Test-bed at JET where a coated carbon fibre composite block was exposed to a total of 113 pulses with a maximum peak power density of 15.7 MW m−2 and a maximum surface temperature of 1280 °C. No visible changes as a result of thermal cycling nor sputtering of the film by deuterium could be detected.",
    keywords = "tungsten coating, plasma, tungsten, erosion, deposition, divertor tiles, divertor, JET, ITER, fusion energy, fusion reactors",
    author = "Sari Lehto and Jari Likonen and J.P. Coad and T. Ahlgren and D.E. Hole and M. Mayer and H. Maier and J. Kolehmainen",
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    Lehto, S, Likonen, J, Coad, JP, Ahlgren, T, Hole, DE, Mayer, M, Maier, H & Kolehmainen, J 2003, 'Tungsten coating on JET divertor tiles for erosion/deposition studies', Fusion Engineering and Design, vol. 66-68, pp. 241-245. https://doi.org/10.1016/S0920-3796(03)00291-6

    Tungsten coating on JET divertor tiles for erosion/deposition studies. / Lehto, Sari (Corresponding Author); Likonen, Jari; Coad, J.P.; Ahlgren, T.; Hole, D.E.; Mayer, M.; Maier, H.; Kolehmainen, J.

    In: Fusion Engineering and Design, Vol. 66-68, 2003, p. 241-245.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Lehto, Sari

    AU - Likonen, Jari

    AU - Coad, J.P.

    AU - Ahlgren, T.

    AU - Hole, D.E.

    AU - Mayer, M.

    AU - Maier, H.

    AU - Kolehmainen, J.

    PY - 2003

    Y1 - 2003

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    AB - Six Joint European Torus (JET) divertor tiles were coated with tungsten marker stripes for erosion/deposition studies. The average thickness was 3.4 μm and the film was uniform within 5% across and within 10% along the stripe. Small amounts of impurities C, Fe, Ni and Cr were found and the in-plane stress was 965 MPa. Resistance to high heat loads was tested in the Neutral Beam Test-bed at JET where a coated carbon fibre composite block was exposed to a total of 113 pulses with a maximum peak power density of 15.7 MW m−2 and a maximum surface temperature of 1280 °C. No visible changes as a result of thermal cycling nor sputtering of the film by deuterium could be detected.

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    KW - erosion

    KW - deposition

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    KW - ITER

    KW - fusion energy

    KW - fusion reactors

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